2.2.0.25truefalse010002 - Document - LT NY Muni {Unlabeled}falsefalsetrue1falsefalseUSDtruefalse{dei_DocumentInformationDocumentAxis} : AAAA Member {dei_LegalEntityAxis} : S000010049 Member 3/30/2011 - 3/30/2011 USD ($) $c_S000010049_AAAAhttp://www.sec.gov/CIK0000876409duration2011-03-30T00:00:002011-03-30T00:00:00falsefalseoppenheimer_AAAAMemberdei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_AAAAMemberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalseoppenheimer_S000010049Memberdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_S000010049Memberdei_LegalEntityAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170RatioStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$1false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://oppenheimer/role/aaaa1falsefalsefalse00Limited Term New York Municipal Fund | Oppenheimer Limited Term New York Municipal FundLimited Term New York Municipal Fund | Oppenheimer Limited Term New York Municipal Fundfalsefalsefalsefalsefalse1falsefalseUSDtruefalse{dei_DocumentInformationDocumentAxis} : AAAA Member {dei_LegalEntityAxis} : S000010049 Member 3/30/2011 - 3/30/2011 USD ($) $c_S000010049_AAAAhttp://www.sec.gov/CIK0000876409duration2011-03-30T00:00:002011-03-30T00:00:00falsefalseoppenheimer_AAAAMemberdei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_AAAAMemberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalseoppenheimer_S000010049Memberdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_S000010049Memberdei_LegalEntityAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170RatioStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseLimited Term New York Municipal Fund | Oppenheimer Limited Term New York Municipal Fund3false0rr_ObjectivePrimaryTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00 Investment Objective. The Fund seeks as high a level of income exempt from federal income tax and New York State and New York City personal income taxes as is consistent with its investment policies and prudent investment management. falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringInvestment Objectives/Goals. Disclose the Fund's investment objectives or goals. A Fund also may identify its type or category (e.g., that it is a Money Market Fund or a balanced fund).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 2 -Subsection a falsefalseObjective, Primary [Text Block]4false0rr_ExpenseNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00 Fees and Expenses of the Fund. This table describes the fees and expenses that you may pay if you buy and hold or redeem shares of the Fund. You may qualify for sales charge discounts if you (or you and your spouse) invest, or agree to invest in the future, at least $100,000 in certain funds in the Oppenheimer family of funds. More information about these and other discounts is available from your financial professional and in the section "About Your Account" beginning on page 13 of the prospectus and in the sections "How to Buy Shares" beginning on page 58 and "Appendix A" in the Fund's Statement of Additional Information. falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringThis table describes the fees and expenses that you may pay if you buy and hold shared of the Fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $[_____] in [name of fund family] funds. Include the narrative explanations in the order indicated. A Fund may modify the narrative explanations if the explanation contains comparable information to that shown.The narrative explanation regarding sales charge discounts is only required by a Fund that offers such discounts and should specify the minimum level of investment required to qualify for a discount. Modify the narrative explanation to state that Fund shares are sold on a national securities exchange at the end of the time periods indicated, and that brokerage commissions for buying and selling Fund shares through a broker are not reflected.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph b -Subsection instructions falsefalseExpense Narrative [Text Block]5false0rr_ShareholderFeesCaptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00 Shareholder Fees (fees paid directly from your investment) falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringShareholder Fees (fees paid directly from your investment).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subsection table falsefalseShareholder Fees Caption [Text]6false0rr_ShareholderFeesTableTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div style="display:none">~http://oppenheimer/role/ShareholderFeesDataAAAA column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact oppenheimer_S000010049Member ~</div>falsefalse<div style="display:none">~http://oppenheimer/role/ShareholderFeesDataAAAA column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact oppenheimer_S000010049Member ~</div>falsehttp://oppenheimer/role/ShareholderFeesDataAAAAfalsefalse020012 - Schedule - Shareholder Feestruefalsefalse1falseColumnperiodPeriod*Columnrr_ProspectusShareClassAxisAxis*Columndei_DocumentInformationDocumentAxisAxis*ColumnunitUnit*duration2011-03-30T00:00:002011-03-30T00:00:00falsefalseClass Arr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_C000027833Memberrr_ProspectusShareClassAxisexplicitMemberfalsefalseLimited Term New York Municipal Funddei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_AAAAMemberdei_DocumentInformationDocumentAxisexplicitMemberClass ALimited Term New York Municipal FundUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$2falseColumnperiodPeriod*Columnrr_ProspectusShareClassAxisAxis*Columndei_DocumentInformationDocumentAxisAxis*ColumnunitUnit*duration2011-03-30T00:00:002011-03-30T00:00:00falsefalseClass Brr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_C000027834Memberrr_ProspectusShareClassAxisexplicitMemberfalsefalseLimited Term New York Municipal Funddei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_AAAAMemberdei_DocumentInformationDocumentAxisexplicitMemberClass BLimited Term New York Municipal FundUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$3falseColumnperiodPeriod*Columnrr_ProspectusShareClassAxisAxis*Columndei_DocumentInformationDocumentAxisAxis*ColumnunitUnit*duration2011-03-30T00:00:002011-03-30T00:00:00falsefalseClass Crr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_C000027835Memberrr_ProspectusShareClassAxisexplicitMemberfalsefalseLimited Term New York Municipal Funddei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_AAAAMemberdei_DocumentInformationDocumentAxisexplicitMemberClass CLimited Term New York Municipal FundUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$4falseColumnperiodPeriod*Columnrr_ProspectusShareClassAxisAxis*Columndei_DocumentInformationDocumentAxisAxis*ColumnunitUnit*duration2011-03-30T00:00:002011-03-30T00:00:00falsefalseClass Yrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_C000099311Memberrr_ProspectusShareClassAxisexplicitMemberfalsefalseLimited Term New York Municipal Funddei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_AAAAMemberdei_DocumentInformationDocumentAxisexplicitMemberClass YLimited Term New York Municipal FundUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$1falseRowprimaryElement*Rowdei_LegalEntityAxisAxisoppenheimer_S000010049Member3false0rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPricerrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.0350.035falsefalsefalsetruefalse2truetruetrue00falsefalsefalsetruefalse3truetruetrue00falsefalsefalsetruefalse4truetruetrue00falsefalsefalsetruefalseOtherrr:NonNegativePure4TypepureMaximum Deferred Sales Charge (Load) (as a percentage of ____) A.3.instructions.2.a.i "Maximum Deferred Sales Charge (Load)" includes the maximum total deferred sales charge (load) payable upon redemption, in installments, or both, expressed as a percentage of the amount or amounts stated in response to Item 7(a), except that, for a sales charge (load) based on net asset value at the time of purchase, show the sales charge (load) as a percentage of the offering price at the time of purchase. A Fund may include in a footnote to the table, if applicable, a tabular presentation showing the amount of deferred sales charges (loads) over time or a narrative explanation of the sales charges (loads) (e.g., __% in the first year after purchase, declining to __% in the __ year and eliminated thereafter). A.3.instructions.2.a.ii If more than one type of sales charge (load) is imposed (e.g., a deferred sales charge (load) and a front-end sales charge (load)), the first caption in the table should read "Maximum Sales Charge (Load)" and show the maximum cumulative percentage. Show the percentage amounts and the terms of each sales charge (load) comprising that figure on separate lines below.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 1 -Subsection table falsefalseMaximum Sales Charge (Load) imposed on purchases (as % of offering price)falsefalseOppenheimer Limited Term New York Municipal Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_S000010049Memberdei_LegalEntityAxisexplicitMemberOppenheimer Limited Term New York Municipal Fund0rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPricetruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.0350.035falsefalsefalsetruefalse2truetruetrue00falsefalsefalsetruefalse3truetruetrue00falsefalsefalsetruefalse4truetruetrue00falsefalsefalsetruefalseOthernanafalsefalseMaximum Sales Charge (Load) imposed on purchases (as % of offering price)2falseRowprimaryElement*Rowdei_LegalEntityAxisAxisoppenheimer_S000010049Member4false0rr_MaximumDeferredSalesChargeOverOfferingPricerrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue00falsefalsefalsetruefalse2truetruetrue0.040.04falsefalsefalsetruefalse3truetruetrue0.010.01falsefalsefalsetruefalse4truetruetrue00falsefalsefalsetruefalseOtherrr:NonNegativePure4TypepureMaximum Deferred Sales Charge (Load) (as a percentage of ____) A.3.instructions.2.a.i "Maximum Deferred Sales Charge (Load)" includes the maximum total deferred sales charge (load) payable upon redemption, in installments, or both, expressed as a percentage of the amount or amounts stated in response to Item 7(a), except that, for a sales charge (load) based on net asset value at the time of purchase, show the sales charge (load) as a percentage of the offering price at the time of purchase. A Fund may include in a footnote to the table, if applicable, a tabular presentation showing the amount of deferred sales charges (loads) over time or a narrative explanation of the sales charges (loads) (e.g., __% in the first year after purchase, declining to __% in the __ year and eliminated thereafter). A.3.instructions.2.a.ii If more than one type of sales charge (load) is imposed (e.g., a deferred sales charge (load) and a front-end sales charge (load)), the first caption in the table should read "Maximum Sales Charge (Load)" and show the maximum cumulative percentage. Show the percentage amounts and the terms of each sales charge (load) comprising that figure on separate lines below.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph a -Clause i -Subsection instructions falsefalseMaximum Deferred Sales Charge (Load) (as % of the lower of the original offering price or redemption proceeds)falsefalseOppenheimer Limited Term New York Municipal Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_S000010049Memberdei_LegalEntityAxisexplicitMemberOppenheimer Limited Term New York Municipal Fund0rr_MaximumDeferredSalesChargeOverOfferingPricetruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue00falsefalsefalsetruefalse2truetruetrue0.040.04falsefalsefalsetruefalse3truetruetrue0.010.01falsefalsefalsetruefalse4truetruetrue00falsefalsefalsetruefalseOthernanafalsefalseMaximum Deferred Sales Charge (Load) (as % of the lower of the original offering price or redemption proceeds)42Shareholder Fees Limited Term New York Municipal Fund Oppenheimer Limited Term New York Municipal FundUnKnownUnKnownUnKnownUnKnownfalsetrueColumnperiodPeriod*Columnrr_ProspectusShareClassAxisAxis*Columndei_DocumentInformationDocumentAxisAxis*ColumnunitUnit*RowprimaryElement*Rowdei_LegalEntityAxisAxisoppenheimer_S000010049MemberfalsefalsefalseOtherus-types:textBlockItemTypestringContains a command for the SEC Viewer for the role corresponding to ShareholderFeesData.No authoritative reference available.falsefalseShareholder Fees [Table]7false0rr_OperatingExpensesCaptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00 Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringAnnual Fund Operating Expenses (ongoing expenses that you pay each year as a percentage of the value of your investment)Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 7 -Subsection table falsefalseOperating Expenses Caption [Text]8false0rr_AnnualFundOperatingExpensesTableTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div style="display:none">~ http://oppenheimer/role/OperatingExpensesDataAAAA column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact oppenheimer_S000010049Member ~</div>falsefalse<div style="display:none">~ http://oppenheimer/role/OperatingExpensesDataAAAA column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact oppenheimer_S000010049Member ~</div>falsehttp://oppenheimer/role/OperatingExpensesDataAAAAfalsefalse020022 - Schedule - Annual Fund Operating Expensestruefalsefalse1falseColumnperiodPeriod*Columnrr_ProspectusShareClassAxisAxis*Columndei_DocumentInformationDocumentAxisAxis*ColumnunitUnit*duration2011-03-30T00:00:002011-03-30T00:00:00falsefalseClass Arr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_C000027833Memberrr_ProspectusShareClassAxisexplicitMemberfalsefalseLimited Term New York Municipal Funddei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_AAAAMemberdei_DocumentInformationDocumentAxisexplicitMemberClass ALimited Term New York Municipal FundUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$2falseColumnperiodPeriod*Columnrr_ProspectusShareClassAxisAxis*Columndei_DocumentInformationDocumentAxisAxis*ColumnunitUnit*duration2011-03-30T00:00:002011-03-30T00:00:00falsefalseClass Brr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_C000027834Memberrr_ProspectusShareClassAxisexplicitMemberfalsefalseLimited Term New York Municipal Funddei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_AAAAMemberdei_DocumentInformationDocumentAxisexplicitMemberClass BLimited Term New York Municipal FundUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$3falseColumnperiodPeriod*Columnrr_ProspectusShareClassAxisAxis*Columndei_DocumentInformationDocumentAxisAxis*ColumnunitUnit*duration2011-03-30T00:00:002011-03-30T00:00:00falsefalseClass Crr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_C000027835Memberrr_ProspectusShareClassAxisexplicitMemberfalsefalseLimited Term New York Municipal Funddei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_AAAAMemberdei_DocumentInformationDocumentAxisexplicitMemberClass CLimited Term New York Municipal FundUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$4falseColumnperiodPeriod*Columnrr_ProspectusShareClassAxisAxis*Columndei_DocumentInformationDocumentAxisAxis*ColumnunitUnit*duration2011-03-30T00:00:002011-03-30T00:00:00falsefalseClass Yrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_C000099311Memberrr_ProspectusShareClassAxisexplicitMemberfalsefalseLimited Term New York Municipal Funddei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_AAAAMemberdei_DocumentInformationDocumentAxisexplicitMemberClass YLimited Term New York Municipal FundUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$1falseRowprimaryElement*Rowdei_LegalEntityAxisAxisoppenheimer_S000010049Member3false0rr_ManagementFeesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.0040.004falsefalsefalsetruefalse2truetruetrue0.0040.004falsefalsefalsetruefalse3truetruetrue0.0040.004falsefalsefalsetruefalse4truetruetrue0.0040.004[1]falsefalsefalsetruefalseOtherrr:NonNegativePure4TypepureManagement Fees include investment advisory fees (including any fees based on the Fund's performance), any other management fees payable to the investment adviser or its affiliates, and administrative fees payable to the investment adviser or its affiliates that are not included as "Other Expenses."Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph a -Subsection instructions falsefalseManagement FeesfalsefalseOppenheimer Limited Term New York Municipal Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_S000010049Memberdei_LegalEntityAxisexplicitMemberOppenheimer Limited Term New York Municipal Fund0rr_ManagementFeesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.0040.004falsefalsefalsetruefalse2truetruetrue0.0040.004falsefalsefalsetruefalse3truetruetrue0.0040.004falsefalsefalsetruefalse4truetruetrue0.0040.004[1]falsefalsefalsetruefalseOthernanafalsefalseManagement Fees2falseRowprimaryElement*Rowdei_LegalEntityAxisAxisoppenheimer_S000010049Member4false0rr_DistributionAndService12b1FeesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00250.0025falsefalsefalsetruefalse2truetruetrue0.010.01falsefalsefalsetruefalse3truetruetrue0.010.01falsefalsefalsetruefalse4truetruetrue00[1]falsefalsefalsetruefalseOtherrr:NonNegativePure4TypepureDistribution [and/or Service] (12b-1) Fees" include all distribution or other expenses incurred during the most recent fiscal year under a plan adopted pursuant to rule 12b-1 [17 CFR 270.12b-1]. Under an appropriate caption or a subcaption of "Other Expenses," disclose the amount of any distribution or similar expenses deducted from the Fund's assets other than pursuant to a rule 12b-1 plan.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 9 -Subsection table falsefalseDistribution and/or Service (12b-1) FeesfalsefalseOppenheimer Limited Term New York Municipal Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_S000010049Memberdei_LegalEntityAxisexplicitMemberOppenheimer Limited Term New York Municipal Fund0rr_DistributionAndService12b1FeesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00250.0025falsefalsefalsetruefalse2truetruetrue0.010.01falsefalsefalsetruefalse3truetruetrue0.010.01falsefalsefalsetruefalse4truetruetrue00[1]falsefalsefalsetruefalseOthernanafalsefalseDistribution and/or Service (12b-1) Fees3falseRowprimaryElement*Rowdei_LegalEntityAxisAxisoppenheimer_S000010049Member5false0rr_OtherExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truetruetrue0.00140.0014falsefalsefalsetruefalse2truetruetrue0.00250.0025falsefalsefalsetruefalse3truetruetrue0.00150.0015falsefalsefalsetruefalse4truetruetrue0.00220.0022[1]falsefalsefalsetruefalseOtherrr:NonNegativePure4Typepure"Other Expenses" include all expenses not otherwise disclosed in the table that are deducted from the Fund's assets or charged to all shareholder accounts. The amount of expenses deducted from the Fund's assets are the amounts shown as expenses in the Fund's statement of operations (including increases resulting from complying with paragraph 2(g) of rule 6-07 of Regulation S-X [17 CFR 210.6-07]). "Other Expenses" do not include extraordinary expenses as determined under generally accepted accounting principles (see Accounting Principles Board Opinion No. 30). If extraordinary expenses were incurred that materially affected the Fund's "Other Expenses," disclose in a footnote to the table what "Other Expenses" would have been had the extraordinary expenses been included.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph c -Clause i -Subsection instructions truefalseTotal Other ExpensesfalsefalseOppenheimer Limited Term New York Municipal Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_S000010049Memberdei_LegalEntityAxisexplicitMemberOppenheimer Limited Term New York Municipal Fund0rr_OtherExpensesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00140.0014falsefalsefalsetruefalse2truetruetrue0.00250.0025falsefalsefalsetruefalse3truetruetrue0.00150.0015falsefalsefalsetruefalse4truetruetrue0.00220.0022[1]falsefalsefalsetruefalseOthernanafalsefalseTotal Other Expenses4falseRowprimaryElement*Rowdei_LegalEntityAxisAxisoppenheimer_S000010049Member6false0rr_Component1OtherExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00040.0004falsefalsefalsetruefalse2truetruetrue0.00040.0004falsefalsefalsetruefalse3truetruetrue0.00040.0004falsefalsefalsetruefalse4truetruetrue0.00040.0004[1]falsefalsefalsetruefalseOtherrr:NonNegativePure4TypepureThe Fund may subdivide this caption into no more than three subcaptions that identify the largest expense or expenses comprising "Other Expenses," but must include a total of all "Other Expenses." Alternatively, the Fund may include the components of "Other Expenses" in a parenthetical to the caption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph c -Clause iii -Subsection instructions falsefalseInterest and Fees From BorrowingsfalsefalseOppenheimer Limited Term New York Municipal Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_S000010049Memberdei_LegalEntityAxisexplicitMemberOppenheimer Limited Term New York Municipal Fund0rr_Component1OtherExpensesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00040.0004falsefalsefalsetruefalse2truetruetrue0.00040.0004falsefalsefalsetruefalse3truetruetrue0.00040.0004falsefalsefalsetruefalse4truetruetrue0.00040.0004[1]falsefalsefalsetruefalseOthernanafalsefalseInterest and Fees From Borrowings5falseRowprimaryElement*Rowdei_LegalEntityAxisAxisoppenheimer_S000010049Member7false0rr_Component2OtherExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00030.0003falsefalsefalsetruefalse2truetruetrue0.00030.0003falsefalsefalsetruefalse3truetruetrue0.00030.0003falsefalsefalsetruefalse4truetruetrue0.00030.0003[1]falsefalsefalsetruefalseOtherrr:NonNegativePure4TypepureThe Fund may subdivide this caption into no more than three subcaptions that identify the largest expense or expenses comprising "Other Expenses," but must include a total of all "Other Expenses." Alternatively, the Fund may include the components of "Other Expenses" in a parenthetical to the caption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 10 -Subsection table falsefalseInterest and Related Expenses from Inverse FloatersfalsefalseOppenheimer Limited Term New York Municipal Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_S000010049Memberdei_LegalEntityAxisexplicitMemberOppenheimer Limited Term New York Municipal Fund0rr_Component2OtherExpensesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00030.0003falsefalsefalsetruefalse2truetruetrue0.00030.0003falsefalsefalsetruefalse3truetruetrue0.00030.0003falsefalsefalsetruefalse4truetruetrue0.00030.0003[1]falsefalsefalsetruefalseOthernanafalsefalseInterest and Related Expenses from Inverse Floaters6falseRowprimaryElement*Rowdei_LegalEntityAxisAxisoppenheimer_S000010049Member8false0rr_Component3OtherExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00070.0007falsefalsefalsetruefalse2truetruetrue0.00180.0018falsefalsefalsetruefalse3truetruetrue0.00080.0008falsefalsefalsetruefalse4truetruetrue0.00150.0015[1]falsefalsefalsetruefalseOtherrr:NonNegativePure4TypepureThe Fund may subdivide this caption into no more than three subcaptions that identify the largest expense or expenses comprising "Other Expenses," but must include a total of all "Other Expenses." Alternatively, the Fund may include the components of "Other Expenses" in a parenthetical to the caption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph c -Clause iii -Subsection instructions falsefalseOther ExpensesfalsefalseOppenheimer Limited Term New York Municipal Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_S000010049Memberdei_LegalEntityAxisexplicitMemberOppenheimer Limited Term New York Municipal Fund0rr_Component3OtherExpensesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00070.0007falsefalsefalsetruefalse2truetruetrue0.00180.0018falsefalsefalsetruefalse3truetruetrue0.00080.0008falsefalsefalsetruefalse4truetruetrue0.00150.0015[1]falsefalsefalsetruefalseOthernanafalsefalseOther Expenses7falseRowprimaryElement*Rowdei_LegalEntityAxisAxisoppenheimer_S000010049Member9false0rr_ExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truetruetrue0.00790.0079falsefalsefalsetruefalse2truetruetrue0.01650.0165falsefalsefalsetruefalse3truetruetrue0.01550.0155falsefalsefalsetruefalse4truetruetrue0.00620.0062[1]falsefalsefalsetruefalseOtherrr:NonNegativePure4TypepureTotal Annual Fund Operating Expenses. If the Fund is a Feeder Fund, reflect the aggregate expenses of the Feeder Fund and the Master Fund in a single fee table using the captions provided. In a footnote to the fee table, state that the table and Example reflect the expenses of both the Feeder and Master Funds. If the prospectus offers more than one Class of a Multiple Class Fund or more than one Feeder Fund that invests in the same Master Fund, provide a separate response for each Class or Feeder Fund. Base the percentages of "Annual Fund Operating Expenses" on amounts incurred during the Fund's most recent fiscal year, but include in expenses amounts that would have been incurred absent expense reimbursement or fee waiver arrangements. If the Fund has changed its fiscal year and, as a result, the most recent fiscal year is less than three months, use the fiscal year prior to the most recent fiscal year as the basis for determining "Annual Fund Operating Expenses."Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph d -Subsection instructions truefalseTotal Annual Fund Operating ExpensesfalsefalseOppenheimer Limited Term New York Municipal Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_S000010049Memberdei_LegalEntityAxisexplicitMemberOppenheimer Limited Term New York Municipal Fund0rr_ExpensesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00790.0079falsefalsefalsetruefalse2truetruetrue0.01650.0165falsefalsefalsetruefalse3truetruetrue0.01550.0155falsefalsefalsetruefalse4truetruetrue0.00620.0062[1]falsefalsefalsetruefalseOthernanafalsefalseTotal Annual Fund Operating Expenses1Class Y shares were first available March 30, 2011. The expenses for Class Y shares are estimated for the first full fiscal year that they are offered. 47Annual Fund Operating Expenses Limited Term New York Municipal Fund Oppenheimer Limited Term New York Municipal FundUnKnownUnKnownUnKnownUnKnownfalsetrueColumnperiodPeriod*Columnrr_ProspectusShareClassAxisAxis*Columndei_DocumentInformationDocumentAxisAxis*ColumnunitUnit*RowprimaryElement*Rowdei_LegalEntityAxisAxisoppenheimer_S000010049MemberfalsefalsefalseOtherus-types:textBlockItemTypestringContains a command for the SEC Viewer for the role corresponding to OperatingExpensesData.No authoritative reference available.falsefalseAnnual Fund Operating Expenses [Table]9false0rr_ExpenseExampleNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00 Example. The following Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in a class of shares of the Fund for the time periods indicated. The Example also assumes that your investment has a 5% return each year and that the Fund's operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your expenses would be as follows: falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringThe Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 1 -Subsection example falsefalseExpense Example Narrative [Text Block]10false0rr_ExpenseExampleByYearCaptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00 If shares are redeemed falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalseExpense Example by, Year, Caption [Text]11false0rr_ExpenseExampleWithRedemptionTableTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div style="display:none">~ http://oppenheimer/role/ExpenseExampleAAAA column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact oppenheimer_S000010049Member ~</div>falsefalse<div style="display:none">~ http://oppenheimer/role/ExpenseExampleAAAA column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact oppenheimer_S000010049Member ~</div>truehttp://oppenheimer/role/ExpenseExampleAAAAfalsefalse020032 - Schedule - Expense Example {Transposed}truefalsefalse1falseColumnprimaryElement*Columndei_LegalEntityAxisAxisoppenheimer_S000010049Member3false0rr_ExpenseExampleYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsetrue428428falsefalsefalsetruefalse2truefalsetrue569569falsefalsefalsetruefalse3truefalsetrue259259falsefalsefalsetruefalse4truefalsetrue6464falsefalsefalsetruefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subsection instructions falsefalse1 YearfalsefalseOppenheimer Limited Term New York Municipal Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_S000010049Memberdei_LegalEntityAxisexplicitMemberOppenheimer Limited Term New York Municipal FundfalseUSDfalsefalse$2falseColumnprimaryElement*Columndei_LegalEntityAxisAxisoppenheimer_S000010049Member4false0rr_ExpenseExampleYear03rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsetrue594594falsefalsefalsetruefalse2truefalsetrue725725falsefalsefalsetruefalse3truefalsetrue493493falsefalsefalsetruefalse4truefalsetrue199199falsefalsefalsetruefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalse3 YearsfalsefalseOppenheimer Limited Term New York Municipal Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_S000010049Memberdei_LegalEntityAxisexplicitMemberOppenheimer Limited Term New York Municipal FundfalseUSDfalsefalse$3falseColumnprimaryElement*Columndei_LegalEntityAxisAxisoppenheimer_S000010049Member5false0rr_ExpenseExampleYear05rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsetrue775775falsefalsefalsetruefalse2truefalsetrue10041004falsefalsefalsetruefalse3truefalsetrue851851falsefalsefalsetruefalse4truefalsetrue347347falsefalsefalsetruefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalse5 YearsfalsefalseOppenheimer Limited Term New York Municipal Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_S000010049Memberdei_LegalEntityAxisexplicitMemberOppenheimer Limited Term New York Municipal FundfalseUSDfalsefalse$4falseColumnprimaryElement*Columndei_LegalEntityAxisAxisoppenheimer_S000010049Member6false0rr_ExpenseExampleYear10rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsetrue12971297falsefalsefalsetruefalse2truefalsetrue15241524falsefalsefalsetruefalse3truefalsetrue18601860falsefalsefalsetruefalse4truefalsetrue777777falsefalsefalsetruefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalse10 YearsfalsefalseOppenheimer Limited Term New York Municipal Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_S000010049Memberdei_LegalEntityAxisexplicitMemberOppenheimer Limited Term New York Municipal FundfalseUSDfalsefalse$1falseRowperiodPeriod*Rowrr_ProspectusShareClassAxisAxis*Rowdei_DocumentInformationDocumentAxisAxis*RowunitUnit*duration2011-03-30T00:00:002011-03-30T00:00:00falsefalseClass Arr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_C000027833Memberrr_ProspectusShareClassAxisexplicitMemberfalsefalseLimited Term New York Municipal Funddei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_AAAAMemberdei_DocumentInformationDocumentAxisexplicitMemberClass ALimited Term New York Municipal FundUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue428428falsefalsefalsetruefalse2truefalsetrue594594falsefalsefalsetruefalse3truefalsetrue775775falsefalsefalsetruefalse4truefalsetrue12971297falsefalsefalsetruefalseOthernanafalsefalseClass A2falseRowperiodPeriod*Rowrr_ProspectusShareClassAxisAxis*Rowdei_DocumentInformationDocumentAxisAxis*RowunitUnit*duration2011-03-30T00:00:002011-03-30T00:00:00falsefalseClass Brr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_C000027834Memberrr_ProspectusShareClassAxisexplicitMemberfalsefalseLimited Term New York Municipal Funddei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_AAAAMemberdei_DocumentInformationDocumentAxisexplicitMemberClass BLimited Term New York Municipal FundUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue569569falsefalsefalsetruefalse2truefalsetrue725725falsefalsefalsetruefalse3truefalsetrue10041004falsefalsefalsetruefalse4truefalsetrue15241524falsefalsefalsetruefalseOthernanafalsefalseClass B3falseRowperiodPeriod*Rowrr_ProspectusShareClassAxisAxis*Rowdei_DocumentInformationDocumentAxisAxis*RowunitUnit*duration2011-03-30T00:00:002011-03-30T00:00:00falsefalseClass Crr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_C000027835Memberrr_ProspectusShareClassAxisexplicitMemberfalsefalseLimited Term New York Municipal Funddei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_AAAAMemberdei_DocumentInformationDocumentAxisexplicitMemberClass CLimited Term New York Municipal FundUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue259259falsefalsefalsetruefalse2truefalsetrue493493falsefalsefalsetruefalse3truefalsetrue851851falsefalsefalsetruefalse4truefalsetrue18601860falsefalsefalsetruefalseOthernanafalsefalseClass C4falseRowperiodPeriod*Rowrr_ProspectusShareClassAxisAxis*Rowdei_DocumentInformationDocumentAxisAxis*RowunitUnit*duration2011-03-30T00:00:002011-03-30T00:00:00falsefalseClass Yrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_C000099311Memberrr_ProspectusShareClassAxisexplicitMemberfalsefalseLimited Term New York Municipal Funddei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_AAAAMemberdei_DocumentInformationDocumentAxisexplicitMemberClass YLimited Term New York Municipal FundUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue6464falsefalsefalsetruefalse2truefalsetrue199199falsefalsefalsetruefalse3truefalsetrue347347falsefalsefalsetruefalse4truefalsetrue777777falsefalsefalsetruefalseOthernanafalsefalseClass Y44Expense Example Oppenheimer Limited Term New York Municipal Fund Limited Term New York Municipal Fund (USD $)UnKnownUnKnownUnKnownUnKnownfalsetrueColumnprimaryElement*Columndei_LegalEntityAxisAxisoppenheimer_S000010049MemberRowperiodPeriod*Rowrr_ProspectusShareClassAxisAxis*Rowdei_DocumentInformationDocumentAxisAxis*RowunitUnit*falsefalsefalseOtherus-types:textBlockItemTypestringContains a command for the SEC Viewer for the role corresponding to ExpenseExample.No authoritative reference available.falsefalseExpense Example, With Redemption [Table]12false0rr_ExpenseExampleNoRedemptionByYearCaptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00 If shares are not redeemed falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph 1 -Subsection example falsefalseExpense Example, No Redemption, By Year, Caption [Text]13false0rr_ExpenseExampleNoRedemptionTableTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div style="display:none">~ http://oppenheimer/role/ExpenseExampleNoRedemptionAAAA column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact oppenheimer_S000010049Member ~</div>falsefalse<div style="display:none">~ http://oppenheimer/role/ExpenseExampleNoRedemptionAAAA column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact oppenheimer_S000010049Member ~</div>truehttp://oppenheimer/role/ExpenseExampleNoRedemptionAAAAfalsefalse020042 - Schedule - Expense Example, No Redemption {Transposed}truefalsefalse1falseColumnprimaryElement*Columndei_LegalEntityAxisAxisoppenheimer_S000010049Member3false0rr_ExpenseExampleNoRedemptionYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsetrue428428falsefalsefalsetruefalse2truefalsetrue169169falsefalsefalsetruefalse3truefalsetrue159159falsefalsefalsetruefalse4truefalsetrue6464falsefalsefalsetruefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph 1 -Subsection example falsefalse1 YearfalsefalseOppenheimer Limited Term New York Municipal Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_S000010049Memberdei_LegalEntityAxisexplicitMemberOppenheimer Limited Term New York Municipal FundfalseUSDfalsefalse$2falseColumnprimaryElement*Columndei_LegalEntityAxisAxisoppenheimer_S000010049Member4false0rr_ExpenseExampleNoRedemptionYear03rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsetrue594594falsefalsefalsetruefalse2truefalsetrue525525falsefalsefalsetruefalse3truefalsetrue493493falsefalsefalsetruefalse4truefalsetrue199199falsefalsefalsetruefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph 1 -Subsection example falsefalse3 YearsfalsefalseOppenheimer Limited Term New York Municipal Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_S000010049Memberdei_LegalEntityAxisexplicitMemberOppenheimer Limited Term New York Municipal FundfalseUSDfalsefalse$3falseColumnprimaryElement*Columndei_LegalEntityAxisAxisoppenheimer_S000010049Member5false0rr_ExpenseExampleNoRedemptionYear05rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsetrue775775falsefalsefalsetruefalse2truefalsetrue904904falsefalsefalsetruefalse3truefalsetrue851851falsefalsefalsetruefalse4truefalsetrue347347falsefalsefalsetruefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subparagraph f -Subsection instructions falsefalse5 YearsfalsefalseOppenheimer Limited Term New York Municipal Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_S000010049Memberdei_LegalEntityAxisexplicitMemberOppenheimer Limited Term New York Municipal FundfalseUSDfalsefalse$4falseColumnprimaryElement*Columndei_LegalEntityAxisAxisoppenheimer_S000010049Member6false0rr_ExpenseExampleNoRedemptionYear10rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsetrue12971297falsefalsefalsetruefalse2truefalsetrue15241524falsefalsefalsetruefalse3truefalsetrue18601860falsefalsefalsetruefalse4truefalsetrue777777falsefalsefalsetruefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subparagraph f -Subsection instructions falsefalse10 YearsfalsefalseOppenheimer Limited Term New York Municipal Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_S000010049Memberdei_LegalEntityAxisexplicitMemberOppenheimer Limited Term New York Municipal FundfalseUSDfalsefalse$1falseRowperiodPeriod*Rowrr_ProspectusShareClassAxisAxis*Rowdei_DocumentInformationDocumentAxisAxis*RowunitUnit*duration2011-03-30T00:00:002011-03-30T00:00:00falsefalseClass Arr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_C000027833Memberrr_ProspectusShareClassAxisexplicitMemberfalsefalseLimited Term New York Municipal Funddei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_AAAAMemberdei_DocumentInformationDocumentAxisexplicitMemberClass ALimited Term New York Municipal FundUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue428428falsefalsefalsetruefalse2truefalsetrue594594falsefalsefalsetruefalse3truefalsetrue775775falsefalsefalsetruefalse4truefalsetrue12971297falsefalsefalsetruefalseOthernanafalsefalseClass A2falseRowperiodPeriod*Rowrr_ProspectusShareClassAxisAxis*Rowdei_DocumentInformationDocumentAxisAxis*RowunitUnit*duration2011-03-30T00:00:002011-03-30T00:00:00falsefalseClass Brr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_C000027834Memberrr_ProspectusShareClassAxisexplicitMemberfalsefalseLimited Term New York Municipal Funddei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_AAAAMemberdei_DocumentInformationDocumentAxisexplicitMemberClass BLimited Term New York Municipal FundUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue169169falsefalsefalsetruefalse2truefalsetrue525525falsefalsefalsetruefalse3truefalsetrue904904falsefalsefalsetruefalse4truefalsetrue15241524falsefalsefalsetruefalseOthernanafalsefalseClass B3falseRowperiodPeriod*Rowrr_ProspectusShareClassAxisAxis*Rowdei_DocumentInformationDocumentAxisAxis*RowunitUnit*duration2011-03-30T00:00:002011-03-30T00:00:00falsefalseClass Crr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_C000027835Memberrr_ProspectusShareClassAxisexplicitMemberfalsefalseLimited Term New York Municipal Funddei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_AAAAMemberdei_DocumentInformationDocumentAxisexplicitMemberClass CLimited Term New York Municipal FundUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue159159falsefalsefalsetruefalse2truefalsetrue493493falsefalsefalsetruefalse3truefalsetrue851851falsefalsefalsetruefalse4truefalsetrue18601860falsefalsefalsetruefalseOthernanafalsefalseClass C4falseRowperiodPeriod*Rowrr_ProspectusShareClassAxisAxis*Rowdei_DocumentInformationDocumentAxisAxis*RowunitUnit*duration2011-03-30T00:00:002011-03-30T00:00:00falsefalseClass Yrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_C000099311Memberrr_ProspectusShareClassAxisexplicitMemberfalsefalseLimited Term New York Municipal Funddei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_AAAAMemberdei_DocumentInformationDocumentAxisexplicitMemberClass YLimited Term New York Municipal FundUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue6464falsefalsefalsetruefalse2truefalsetrue199199falsefalsefalsetruefalse3truefalsetrue347347falsefalsefalsetruefalse4truefalsetrue777777falsefalsefalsetruefalseOthernanafalsefalseClass Y44Expense Example, No Redemption Oppenheimer Limited Term New York Municipal Fund Limited Term New York Municipal Fund (USD $)UnKnownUnKnownUnKnownUnKnownfalsetrueColumnprimaryElement*Columndei_LegalEntityAxisAxisoppenheimer_S000010049MemberRowperiodPeriod*Rowrr_ProspectusShareClassAxisAxis*Rowdei_DocumentInformationDocumentAxisAxis*RowunitUnit*falsefalsefalseOtherus-types:textBlockItemTypestringContains a command for the SEC Viewer for the role corresponding to ExpenseExampleNoRedemption.No authoritative reference available.falsefalseExpense Example, No Redemption [Table]14false0rr_PortfolioTurnoverTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00 Portfolio Turnover. The Fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in the annual fund operating expenses or in the example, affect the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 14% of the average value of its portfolio. falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringDisclose the portfolio turnover rate provided in response to Item 14(a) for the most recent fiscal year (or for such shorter period as the Fund has been in operation). Disclose the period for which the information is provided if less than a full fiscal year. A Fund that is a Money Market Fund may omit the portfolio turnover information required by this Item.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subsection example falsefalsePortfolio Turnover [Text Block]15false0rr_StrategyNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00 Principal Investment Strategies. Under normal market conditions, as a fundamental policy, the Fund invests at least 95% of its net assets (plus borrowings for investment purposes) in securities issued by: <ul><li> the State of New York and its political subdivisions (cities, towns and counties, for example), </li><li> agencies, instrumentalities (these are state-chartered corporations) and public authorities of the State of New York, and </li><li> territories, commonwealths and possessions of the United States (for example, Puerto Rico, Guam and the Virgin Islands). </li></ul> These are referred to as "New York municipal securities" in this prospectus, which are securities that pay interest that, in the opinion of counsel to the issuer of each security, is exempt from federal, New York state and New York city personal income taxes. These securities primarily include municipal bonds, municipal notes and interests in municipal leases. The Fund seeks to maintain a dollar-weighted effective portfolio maturity of five years or less, however, it can buy securities with maturities of more than five years. Because of events affecting the bond markets and interest rate changes, the maturity of the portfolio might not meet the target at all times. The Fund can invest up to 5% of its total assets in below-investment-grade securities. Investment-grade securities are rated within one of the four highest rating categories of a nationally recognized statistical rating organization such as Standard & Poor's (AAA, AA, A or BBB). The Fund may also invest in unrated securities, in which case the Fund's investment adviser, OppenheimerFunds, Inc., internally assigns ratings to those securities, after assessing their credit quality and other factors, in categories similar to those of nationally recognized statistical rating organizations. The Fund can invest substantial amounts of its assets in private activity municipal securities that pay interest that is tax-exempt but which may be a "tax-preference item" for investors subject to alternative minimum taxation. To the extent the Fund invests in securities that may pay interest subject to alternative minimum taxation, those securities will be counted towards the Fund's policy regarding minimum investments in New York municipal securities as described above. The Fund can also borrow for leverage and invest in "derivatives" to seek increased returns or for hedging purposes. Inverse floaters are the primary type of derivative the Fund uses but it may also invest in interest rate swaps, municipal bond swaps and other derivatives. In selecting investments for the Fund, the portfolio managers generally look at a wide range of New York securities, including unrated bonds and securities of smaller issuers, from different issuers that provide high current income and that might be overlooked by other investors. The Fund may invest a substantial percentage of its assets in "callable" securities, which may be redeemed by the issuer before their maturity date. The portfolio managers also focus on securities with coupon interest or accretion rates, current market interest rates, callability and call prices that might change the effective maturity of particular securities and the overall portfolio and securities with various maturities in an effort to reduce share price volatility and reinvestment risk. These factors may change over time and may vary in particular cases. The portfolio managers may consider selling a security if any of these factors no longer applies to a security purchased for the Fund, but are not required to do so. falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringPrincipal investment strategies of the Fund. Summarize how the Fund intends to achieve its investment objectives by identifying the Fund's principal investment strategies (including the type or types of securities in which the Fund invests or will invest principally) and any policy to concentrate in securities of issuers in a particular industry or group of industries.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection a falsefalseStrategy Narrative [Text Block]16false0rr_RiskNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00 Principal Risks. The price of the Fund's shares can go up and down substantially. The value of the Fund's investments may change because of broad changes in the markets in which the Fund invests or from poor security selection, which could cause the Fund to underperform other funds with similar investment objectives. There is no assurance that the Fund will achieve its investment objective. When you redeem your shares, they may be worth more or less than what you paid for them. These risks mean that you can lose money by investing in the Fund. Main Risks of Investing in Municipal Securities. Municipal securities may be subject to interest rate risk, credit risk, credit spread risk, extension risk and reinvestment risk. Interest rate risk is the risk that when prevailing interest rates fall, the values of already-issued debt securities generally rise; and when prevailing interest rates rise, the values of already-issued debt securities generally fall, and they may be worth less than the amount the Fund paid for them. When interest rates change, the values of longer-term debt securities usually change more than the values of shorter-term debt securities. Credit risk is the risk that the issuer of a security might not make interest and principal payments on the security as they become due. If an issuer fails to pay interest or repay principal, the Fund's income or share value might be reduced. Adverse news about an issuer or a downgrade in an issuer's credit rating, for any reason, can also reduce the market value of the issuer's securities. "Credit spread" is the difference in yield between securities that is due to differences in their credit quality. There is a risk that credit spreads may increase when the market expects lower-grade bonds to default more frequently. Widening credit spreads may quickly reduce the market values of the Fund's lower-rated and non-rated securities. Extension risk is the risk that an increase in interest rates could cause principal payments on a debt security to be repaid at a slower rate than expected. Extension risk is particularly prevalent for a callable security where an increase in interest rates could result in the issuer of that security choosing not to redeem the security as anticipated on the security's call date. Such a decision by the issuer could have the effect of lengthening the debt security's expected maturity, making it more vulnerable to interest rate risk and reducing its market value. Reinvestment risk is the risk that when interest rates fall the Fund may be required to reinvest the proceeds from a security's sale or redemption at a lower interest rate. Callable bonds are generally subject to greater reinvestment risk than non-callable bonds. Special Risks of New York Municipal Securities. Because the Fund invests primarily in New York municipal securities, the value of its portfolio investments will be highly sensitive to events affecting the financial stability of the state of New York and its municipalities, agencies, authorities and other instrumentalities that issue those securities. Changes in legislation or policy, erosion of the tax base, the effects of terrorist acts or natural disasters, or other economic or credit problems may have a significant negative impact on the value of state or local securities. These risks also apply to securities of issuers of U.S. territories, commonwealths or possessions located outside of New York such as Puerto Rico, Guam, the Northern Mariana Islands and the Virgin Islands. Main Risks of Shorter-Term Securities. Normally, when interest rates change, the values of shorter-term debt securities change less than the values of securities with longer maturities. The Fund tries to reduce the volatility of its share prices by seeking to maintain a shorter average effective portfolio maturity. However, shorter-term securities may have lower yields than longer-term securities. Shorter-term securities are also subject to greater extension and reinvestment risk. The Fund is subject to extension risk when principal payments on a debt security occur at a slower rate than expected, potentially extending the average life of the security. For securities with a call date in the near future, there is the risk that an increase in interest rates could result in the issuer of that security choosing not to redeem the security as anticipated on the security's call date. Such a decision by the issuer may effectively change a short- or intermediate-term security into a longer term security, which could have the effect of locking in a below-market interest rate on the security, increasing the security's duration, making the security more vulnerable to interest rate risk, reducing the security's market value and increasing the Fund's average effective portfolio maturity. Under such circumstances, because the values of longer term securities generally fluctuate more widely in response to interest rate changes than shorter term securities, the Fund's volatility could increase. Reinvestment risk is the risk that if interest rates fall the Fund may need to invest the proceeds of redeemed securities in securities with lower interest rates. Taxability Risk. The Fund's investments in municipal securities rely on the opinion of the issuer's bond counsel that the interest paid on those securities will not be subject to federal income tax. Tax opinions are generally provided at the time the municipal security is initially issued. However, after the Fund buys a security, the Internal Revenue Service may determine that a bond issued as tax-exempt should in fact be taxable and the Fund's dividends with respect to that bond might be subject to federal income tax. Special Risks of Below-Investment-Grade Securities. Below-investment-grade debt securities may be subject to greater price fluctuations and have a greater risk that the issuer might not be able to pay interest and principal when due. The market for below-investment-grade securities may be less liquid and they may be harder to value or to sell at an acceptable price, especially during times of market volatility or decline. Municipal Market Volatility and Illiquidity. The municipal bond market can be susceptible to unusual volatility, particularly for lower-rated and unrated securities. Liquidity can be reduced unpredictably in response to overall economic conditions or credit tightening. During times of reduced market liquidity, the Fund may not be able to readily sell bonds at the prices at which they are carried on the Fund's books. If the Fund needed to sell large blocks of bonds to meet shareholder redemption requests or to raise cash, those sales could further reduce the bonds' prices. Municipal Sector Concentration. While the Fund does not invest more than 25% of its total assets in a single industry, certain types of municipal securities (such as general obligation, government appropriation, municipal leases, special assessment and special tax bonds) are not considered a part of any "industry" for purposes of this policy. Therefore, the Fund may invest more than 25% of its total assets in these types of municipal securities. These types of municipal securities may finance, or pay interest from the revenues of, projects that tend to be impacted in the same way by economic, business or political developments which would increase credit risk. For example, legislation on the financing of a project or a declining economic need for the project would likely affect all similar projects. Risks of Tobacco Related Bonds. In 1998, the largest U.S. tobacco manufacturers reached an out of court agreement, known as the Master Settlement Agreement (the "MSA"), to settle claims against them by 46 states and six other U.S. jurisdictions. The tobacco manufacturers agreed to make annual payments to the government entities in exchange for the release of all litigation claims. A number of the states have sold bonds that are backed by those future payments. The Fund may invest in two types of those bonds: (i) bonds that make payments only from a state's interest in the MSA and (ii) bonds that make payments from both the MSA revenue and from an "appropriation pledge" by the state. An "appropriation pledge" requires the state to pass a specific periodic appropriation to make the payments and is generally not an unconditional guarantee of payment by a state. The settlement payments are based on factors, including, but not limited to, annual domestic cigarette shipments, cigarette consumption, inflation and the financial capability of participating tobacco companies. Payments could be reduced if consumption decreases, if market share is lost to non-MSA manufacturers, or if there is a negative outcome in litigation regarding the MSA. The Fund can invest up to 25% of its total assets in tobacco-related bonds without an appropriation pledge that makes payments only from a state's interest in the MSA. Main Risks of Borrowing and Leverage. The Fund can borrow up to one-third of the value of its total assets (including the amount borrowed) from banks, as permitted by the Investment Company Act of 1940. It can use those borrowings for a number of purposes, including for purchasing securities, which can create "leverage." In that case, changes in the value of the Fund's investments will have a larger effect on its share price than if it did not borrow. Borrowing results in interest payments to the lenders and related expenses. Borrowing for investment purposes might reduce the Fund's return if the yield on the securities purchased is less than those borrowing costs. The Fund may also borrow to meet redemption obligations, for temporary and emergency purposes, or to unwind or contribute to trusts in connection with the Fund's investment in inverse floaters. The Fund currently participates in a line of credit with other Oppenheimer funds for its borrowing. Reverse repurchase agreements that the Fund may engage in also create leverage. A reverse repurchase agreement is the sale by the Fund of a debt obligation to a party for a specified price, with the simultaneous agreement by the Fund to repurchase that debt obligation from that party on a future date at a higher price. Similar to a borrowing, reverse repurchase agreements provide the Fund with cash for investment and operational purposes. When the Fund engages in reverse repurchase agreements, changes in the value of the Fund's investments will have a larger effect on its share price than if it did not engage in these transactions due to the effect of leverage. Reverse repurchase agreements create fund expenses and require that the Fund have sufficient cash available to repurchase the debt obligation when required. Reverse repurchase agreements also involve the risk that the market value of the debt obligation that is the subject of the reverse repurchase agreement could decline significantly below the price at which the Fund is obligated to repurchase the security. Risks of Derivatives. A "derivative" is an investment whose value depends on (or is derived from) the value of an underlying security, asset, interest rate, index or currency. Derivatives may be volatile and involve significant risks. Derivative transactions may require the payment of premiums and can increase portfolio turnover. Certain derivative investments may be illiquid. The underlying security or other reference on which a derivative is based, or the derivative itself, may not perform the way the Fund expects it to. The Fund could realize little or no income or lose principal from a derivative investment or a hedge might be unsuccessful. The Fund may also lose money if the issuer of a derivative fails to pay the amount due. Inverse Floaters. The Fund invests in inverse floaters because, under ordinary circumstances, they offer higher yields and thus provide higher income than fixed-rate bonds of comparable maturity and credit quality. An inverse floater is a derivative instrument, typically created by a trust established by a counterparty, that divides a municipal security into two securities: a short-term floating rate security and a long-term floating rate security which is referred to as an "inverse floater." The inverse floater pays interest at rates that move in the opposite direction of those on the short-term floating rate security. Inverse floaters produce less income when short-term interest rates rise (and may pay no income) and more income when short-term interest rates fall. Thus, if short-term interest rates rise after the issuance of the floater, any yield advantage is reduced or eliminated. Under certain circumstances a trust may be collapsed and the Fund may be required to repay the principal amount due on the short-term securities or the difference between the liquidation value of the underlying municipal bond and the principal amount due on those securities. Inverse floaters can be more volatile than conventional fixed-rate bonds. They also entail a degree of leverage and certain inverse floaters may require the Fund to provide collateral for payments on the short-term securities or to "unwind" the transaction. The Fund will not expose more than 5% of its total assets to the effects of leverage from its investments in inverse floaters. Who Is the Fund Designed For? The Fund is designed for investors seeking income exempt from federal, New York State and New York City personal income taxes in a municipal bond Fund that invests primarily in investment-grade securities and seeks to maintain an intermediate effective average maturity. The Fund does not seek capital gains or growth. Investors should be willing to assume credit, interest rate and reinvestment risks. Because it invests in tax-exempt securities, the Fund is not appropriate for retirement plans or other tax-exempt or tax-deferred accounts or for investors whose primary goal is capital growth. The Fund is not a complete investment program. You should carefully consider your own investment goals and risk tolerance before investing in the Fund. An investment in the Fund is not a deposit of any bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringNarrative Risk Disclosure. A Fund may, in responding to this Item, describe the types of investors for whom the Fund is intended or the types of investment goals that may be consistent with an investment in the Fund.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 1 -Subparagraph i -Clause instruction -Subsection b falsefalseRisk Narrative [Text Block]17false0rr_PerformanceNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00 The Fund's Past Performance. The bar chart and table below provide some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year and by showing how the Fund's average annual returns for 1, 5 and 10 years compare with those of a broad measure of market performance. The Fund's past investment performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. More recent performance information is available by calling the toll-free number on the back of this prospectus and on the Fund's website: https://www.oppenheimerfunds.com/fund/LimitedTermNewYorkMunicipalFund falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringRisk/Return Bar Chart and Table.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subsection b falsefalsePerformance Narrative [Text Block]18false0rr_BarChartTableTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div style="display:none">~http://xbrl.sec.gov/rr/role/BarChartData column dei_LegalEntityAxis compact oppenheimer_S000010049Member ~</div>falsefalseBarChart2.jpg<div style="display:none">~http://xbrl.sec.gov/rr/role/BarChartData column dei_LegalEntityAxis compact oppenheimer_S000010049Member ~</div>falsehttp://xbrl.sec.gov/rr/role/BarChartDatafalsefalse020050 - Schedule - Annual Total Returnstruefalsefalse1falseColumnperiodPeriod*Columndei_LegalEntityAxisAxisoppenheimer_S000010049MemberColumndei_DocumentInformationDocumentAxisAxis*ColumnunitUnit*duration2011-03-30T00:00:002011-03-30T00:00:00falsefalseOppenheimer Limited Term New York Municipal Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_S000010049Memberdei_LegalEntityAxisexplicitMemberfalsefalseLimited Term New York Municipal Funddei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_AAAAMemberdei_DocumentInformationDocumentAxisexplicitMemberOppenheimer Limited Term New York Municipal FundLimited Term New York Municipal FundUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$1falseRowprimaryElement*3false0rr_AnnualReturn2001rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.04850.0485falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalseAnnual Return 20010rr_AnnualReturn2001truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.04850.0485falsefalsefalsetruefalseOthernanafalsefalseAnnual Return 20012falseRowprimaryElement*4false0rr_AnnualReturn2002rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.06330.0633falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalseAnnual Return 20020rr_AnnualReturn2002truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.06330.0633falsefalsefalsetruefalseOthernanafalsefalseAnnual Return 20023falseRowprimaryElement*5false0rr_AnnualReturn2003rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.0480.048falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph instructions -Clause 3 -Exhibit a -Subsection b falsefalseAnnual Return 20030rr_AnnualReturn2003truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.0480.048falsefalsefalsetruefalseOthernanafalsefalseAnnual Return 20034falseRowprimaryElement*6false0rr_AnnualReturn2004rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.04770.0477falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph instructions -Clause 3 -Exhibit a -Subsection b falsefalseAnnual Return 20040rr_AnnualReturn2004truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.04770.0477falsefalsefalsetruefalseOthernanafalsefalseAnnual Return 20045falseRowprimaryElement*7false0rr_AnnualReturn2005rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.05130.0513falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalseAnnual Return 20050rr_AnnualReturn2005truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.05130.0513falsefalsefalsetruefalseOthernanafalsefalseAnnual Return 20056falseRowprimaryElement*8false0rr_AnnualReturn2006rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.0530.053falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalseAnnual Return 20060rr_AnnualReturn2006truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.0530.053falsefalsefalsetruefalseOthernanafalsefalseAnnual Return 20067falseRowprimaryElement*9false0rr_AnnualReturn2007rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.01740.0174falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph instructions -Clause 3 -Exhibit a -Subsection b falsefalseAnnual Return 20070rr_AnnualReturn2007truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.01740.0174falsefalsefalsetruefalseOthernanafalsefalseAnnual Return 20078falseRowprimaryElement*10false0rr_AnnualReturn2008rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse-0.1018-0.1018falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalseAnnual Return 20080rr_AnnualReturn2008truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse-0.1018-0.1018falsefalsefalsetruefalseOthernanafalsefalseAnnual Return 20089falseRowprimaryElement*11false0rr_AnnualReturn2009rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.19450.1945falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph instructions -Clause 3 -Exhibit a -Subsection b falsefalseAnnual Return 20090rr_AnnualReturn2009truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.19450.1945falsefalsefalsetruefalseOthernanafalsefalseAnnual Return 200910falseRowprimaryElement*12false0rr_AnnualReturn2010rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.03510.0351falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalseAnnual Return 20100rr_AnnualReturn2010truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.03510.0351falsefalsefalsetruefalseOthernanafalsefalseAnnual Return 2010110Annual Total Returns UnKnownUnKnownUnKnownUnKnownfalsetrueColumnperiodPeriod*Columndei_LegalEntityAxisAxisoppenheimer_S000010049MemberColumndei_DocumentInformationDocumentAxisAxis*ColumnunitUnit*RowprimaryElement*falsefalsefalseOtherus-types:textBlockItemTypestringContains a command for the SEC Viewer for the role corresponding to BarChartData.No authoritative reference available.falsefalseBar Chart [Table]19false0rr_BarChartClosingTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00 Sales charges and taxes are not included and the returns would be lower if they were. During the period shown, the highest return for a calendar quarter was 8.75% (3rd qtr 09) and the lowest return was -7.00% (4th qtr 08). falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalseBar Chart Closing [Text Block]20false0rr_PerformanceTableHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00 Average Annual Total Returns for the periods ended December 31, 2010 falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringThis item represents Average Anuual Total Returns. If a Multiple Class Fund offers a Class in the prospectus that converts into another Class after a stated period, compute average annual total returns in the table by using the returns of the other Class for the period after conversion.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph instructions -Clause 3 -Exhibit c -Subsection b falsefalsePerformance Table Heading21false0rr_PerformanceTableNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00 No performance information is included for Class Y shares because they were not offered prior to the date of this prospectus. The following table shows the average annual total returns for each class of the Fund's shares. After-tax returns are calculated using the highest individual federal marginal income tax rates and do not reflect the impact of state or local taxes. Your actual after-tax returns, depending on your individual tax situation, may differ from those shown and after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns are shown for only one class and after-tax returns for other classes will vary. falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringIf the Fund has annual returns for at least one calendar year, provide a table showing the Fund's (A) average annual total return; (B) average annual total return (after taxes on distributions); and (C) average annual total return (after taxes on distributions and redemption). A Money Market Fund should show only the returns described in clause (A) of the preceding sentence. All returns should be shown for 1-, 5-, and 10- calendar year periods ending on the date of the most recently completed calendar year (or for the life of the Fund, if shorter), but only for periods subsequent to the effective date of the Fund's registration statement. The table also shouldshow the returns of an appropriate broadbased securities market index as defined in Instruction 5 to Item 22(b)(7) for the same periods. A Fund that has been in existence for more than 10 years also may include returns for the life of the Fund. A Money Market Fund may provide the Fund's 7-day yield ending on the date of the most recent calendar year or disclose a toll-free (or collect) telephone number that investors can use to obtain the Fund's current 7-day yield. For a Fund (other than a Money Market Fund or a Fund described in General Instruction C.3.(d)(iii)), provide the information in the following table with the specified captions AVERAGE ANNUAL TOTAL RETURNS (For the periods ended December 31, _____). For a Fund that provides annual total returns for only one calendar year or for a Fund that does not include the bar chart because it does not have annual returns for a full calendar year, modify, as appropriate, the narrative explanation required by paragraph (c)(2)(i) (e.g., by stating that the information gives some indication of the risks of an investment in the Fund by comparing the Fund's performance with a broad measure of market performance).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iv -Subsection b falsefalsePerformance Table Narrative22false0rr_PerformanceTableTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div style="display:none">~ http://oppenheimer/role/PerformanceTableDataAAAA column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact oppenheimer_S000010049Member ~</div>falsefalse<div style="display:none">~ http://oppenheimer/role/PerformanceTableDataAAAA column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact oppenheimer_S000010049Member ~</div>truehttp://oppenheimer/role/PerformanceTableDataAAAAfalsefalse020062 - Schedule - Average Annual Total Returns {Transposed}truefalsefalse1falseColumnprimaryElement*Columndei_LegalEntityAxisAxisoppenheimer_S000010049Member3false0rr_AverageAnnualReturnInceptionDaterrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse001991-09-18falsefalsetruetruefalse2falsetruefalse00falsefalsetruetruefalse3falsetruefalse00falsefalsetruetruefalse4falsetruefalse001997-05-01falsefalsetruetruefalse5falsetruefalse001997-05-01falsefalsetruetruefalse6falsetruefalse00falsefalsetruetruefalse7falsetruefalse00falsefalsetruetruefalseOtherxbrli:dateItemTypedateReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph instructions -Clause 4 -Subsection b falsefalseInception DatefalsefalseOppenheimer Limited Term New York Municipal Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_S000010049Memberdei_LegalEntityAxisexplicitMemberOppenheimer Limited Term New York Municipal FundfalseUSDfalsefalse$2falseColumnprimaryElement*Columndei_LegalEntityAxisAxisoppenheimer_S000010049Member4false0rr_AverageAnnualReturnYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue-0.0011-0.0011falsefalsefalsetruefalse2truetruetrue-0.0011-0.0011falsefalsefalsetruefalse3truetruetrue0.01450.0145falsefalsefalsetruefalse4truetruetrue-0.0134-0.0134falsefalsefalsetruefalse5truetruetrue0.01750.0175falsefalsefalsetruefalse6truetruetrue0.03350.0335falsefalsefalsetruefalse7truetruetrue0.0150.015falsefalsefalsetruefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse1 YearfalsefalseOppenheimer Limited Term New York Municipal Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_S000010049Memberdei_LegalEntityAxisexplicitMemberOppenheimer Limited Term New York Municipal FundfalseUSDfalsefalse$3falseColumnprimaryElement*Columndei_LegalEntityAxisAxisoppenheimer_S000010049Member5false0rr_AverageAnnualReturnYear05rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.0280.028falsefalsefalsetruefalse2truetruetrue0.0280.028falsefalsefalsetruefalse3truetruetrue0.03010.0301falsefalsefalsetruefalse4truetruetrue0.02510.0251falsefalsefalsetruefalse5truetruetrue0.02770.0277falsefalsefalsetruefalse6truetruetrue0.05020.0502falsefalsefalsetruefalse7truetruetrue0.02180.0218falsefalsefalsetruefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse5 YearsfalsefalseOppenheimer Limited Term New York Municipal Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_S000010049Memberdei_LegalEntityAxisexplicitMemberOppenheimer Limited Term New York Municipal FundfalseUSDfalsefalse$4falseColumnprimaryElement*Columndei_LegalEntityAxisAxisoppenheimer_S000010049Member6false0rr_AverageAnnualReturnYear10rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.03980.0398falsefalsefalsetruefalse2truetruetrue0.03980.0398falsefalsefalsetruefalse3truetruetrue0.04040.0404falsefalsefalsetruefalse4truetruetrue0.03880.0388falsefalsefalsetruefalse5truetruetrue0.03580.0358falsefalsefalsetruefalse6truetruetrue0.04940.0494falsefalsefalsetruefalse7truetruetrue0.02340.0234falsefalsefalsetruefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse10 YearsfalsefalseOppenheimer Limited Term New York Municipal Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_S000010049Memberdei_LegalEntityAxisexplicitMemberOppenheimer Limited Term New York Municipal FundfalseUSDfalsefalse$1falseRowperiodPeriod*Rowrr_ProspectusShareClassAxisAxis*Rowdei_DocumentInformationDocumentAxisAxis*Rowrr_PerformanceMeasureAxisAxis*RowunitUnit*duration2011-03-30T00:00:002011-03-30T00:00:00falsefalseClass Arr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_C000027833Memberrr_ProspectusShareClassAxisexplicitMemberfalsefalseLimited Term New York Municipal Funddei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_AAAAMemberdei_DocumentInformationDocumentAxisexplicitMembertruefalseBefore Taxesrr_PerformanceMeasureAxisrr_PerformanceMeasureDomainrr_PerformanceMeasureAxisexplicitMemberClass ALimited Term New York Municipal FundBefore TaxesUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse001991-09-181991-09-18falsefalsetruetruefalse2truetruetrue-0.0011-0.0011falsefalsefalsetruefalse3truetruetrue0.0280.028falsefalsefalsetruefalse4truetruetrue0.03980.0398falsefalsefalsetruefalseOthernanafalsefalseClass A2falseRowperiodPeriod*Rowrr_ProspectusShareClassAxisAxis*Rowdei_DocumentInformationDocumentAxisAxis*Rowrr_PerformanceMeasureAxisAxis*RowunitUnit*duration2011-03-30T00:00:002011-03-30T00:00:00falsefalseClass Arr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_C000027833Memberrr_ProspectusShareClassAxisexplicitMemberfalsefalseLimited Term New York Municipal Funddei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_AAAAMemberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalseAfter Taxes on Distributionsrr_PerformanceMeasureAxisxbrldihttp://xbrl.org/2006/xbrldirr_AfterTaxesOnDistributionsMemberrr_PerformanceMeasureAxisexplicitMemberClass ALimited Term New York Municipal FundAfter Taxes on DistributionsStandard00truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2truetruetrue-0.0011-0.0011falsefalsefalsetruefalse3truetruetrue0.0280.028falsefalsefalsetruefalse4truetruetrue0.03980.0398falsefalsefalsetruefalseOthernanafalsefalseClass A After Taxes on Distributions3falseRowperiodPeriod*Rowrr_ProspectusShareClassAxisAxis*Rowdei_DocumentInformationDocumentAxisAxis*Rowrr_PerformanceMeasureAxisAxis*RowunitUnit*duration2011-03-30T00:00:002011-03-30T00:00:00falsefalseClass Arr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_C000027833Memberrr_ProspectusShareClassAxisexplicitMemberfalsefalseLimited Term New York Municipal Funddei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_AAAAMemberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalseAfter Taxes on Distributions and Sale of Fund Sharesrr_PerformanceMeasureAxisxbrldihttp://xbrl.org/2006/xbrldirr_AfterTaxesOnDistributionsAndSalesMemberrr_PerformanceMeasureAxisexplicitMemberClass ALimited Term New York Municipal FundAfter Taxes on Distributions and Sale of Fund SharesStandard00truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2truetruetrue0.01450.0145falsefalsefalsetruefalse3truetruetrue0.03010.0301falsefalsefalsetruefalse4truetruetrue0.04040.0404falsefalsefalsetruefalseOthernanafalsefalseClass A After Taxes on Distributions and Sale of Fund Shares4falseRowperiodPeriod*Rowrr_ProspectusShareClassAxisAxis*Rowdei_DocumentInformationDocumentAxisAxis*Rowrr_PerformanceMeasureAxisAxis*RowunitUnit*duration2011-03-30T00:00:002011-03-30T00:00:00falsefalseClass Brr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_C000027834Memberrr_ProspectusShareClassAxisexplicitMemberfalsefalseLimited Term New York Municipal Funddei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_AAAAMemberdei_DocumentInformationDocumentAxisexplicitMembertruefalseBefore Taxesrr_PerformanceMeasureAxisrr_PerformanceMeasureDomainrr_PerformanceMeasureAxisexplicitMemberClass BLimited Term New York Municipal FundBefore TaxesUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse001997-05-011997-05-01falsefalsetruetruefalse2truetruetrue-0.0134-0.0134falsefalsefalsetruefalse3truetruetrue0.02510.0251falsefalsefalsetruefalse4truetruetrue0.03880.0388falsefalsefalsetruefalseOthernanafalsefalseClass B5falseRowperiodPeriod*Rowrr_ProspectusShareClassAxisAxis*Rowdei_DocumentInformationDocumentAxisAxis*Rowrr_PerformanceMeasureAxisAxis*RowunitUnit*duration2011-03-30T00:00:002011-03-30T00:00:00falsefalseClass Crr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_C000027835Memberrr_ProspectusShareClassAxisexplicitMemberfalsefalseLimited Term New York Municipal Funddei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_AAAAMemberdei_DocumentInformationDocumentAxisexplicitMembertruefalseBefore Taxesrr_PerformanceMeasureAxisrr_PerformanceMeasureDomainrr_PerformanceMeasureAxisexplicitMemberClass CLimited Term New York Municipal FundBefore TaxesUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse001997-05-011997-05-01falsefalsetruetruefalse2truetruetrue0.01750.0175falsefalsefalsetruefalse3truetruetrue0.02770.0277falsefalsefalsetruefalse4truetruetrue0.03580.0358falsefalsefalsetruefalseOthernanafalsefalseClass C6falseRowperiodPeriod*Rowrr_ProspectusShareClassAxisAxis*Rowdei_DocumentInformationDocumentAxisAxis*Rowrr_PerformanceMeasureAxisAxis*RowunitUnit*duration2011-03-30T00:00:002011-03-30T00:00:00truefalseShare Classesrr_ProspectusShareClassAxisrr_ShareClassDomainrr_ProspectusShareClassAxisexplicitMemberfalsefalseLimited Term New York Municipal Funddei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_AAAAMemberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalseMerrill Lynch Municipal Bond Index (3-7 Years) (reflects no deduction for fees, expenses or taxes)rr_PerformanceMeasureAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_bench2011040607AAAAMemberrr_PerformanceMeasureAxisexplicitMemberShare ClassesLimited Term New York Municipal FundMerrill Lynch Municipal Bond Index (3-7 Years) (reflects no deduction for fees, expenses or taxes)Standard00truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2truetruetrue0.03350.0335falsefalsefalsetruefalse3truetruetrue0.05020.0502falsefalsefalsetruefalse4truetruetrue0.04940.0494falsefalsefalsetruefalseOthernanafalsefalseMerrill Lynch Municipal Bond Index (3-7 Years) (reflects no deduction for fees, expenses or taxes)7falseRowperiodPeriod*Rowrr_ProspectusShareClassAxisAxis*Rowdei_DocumentInformationDocumentAxisAxis*Rowrr_PerformanceMeasureAxisAxis*RowunitUnit*duration2011-03-30T00:00:002011-03-30T00:00:00truefalseShare Classesrr_ProspectusShareClassAxisrr_ShareClassDomainrr_ProspectusShareClassAxisexplicitMemberfalsefalseLimited Term New York Municipal Funddei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_AAAAMemberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalseConsumer Price Index (reflects no deduction for fees, expenses or taxes)rr_PerformanceMeasureAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_ConsumerPriceIndexAAAAMemberrr_PerformanceMeasureAxisexplicitMemberShare ClassesLimited Term New York Municipal FundConsumer Price Index (reflects no deduction for fees, expenses or taxes)Standard00truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2truetruetrue0.0150.015falsefalsefalsetruefalse3truetruetrue0.02180.0218falsefalsefalsetruefalse4truetruetrue0.02340.0234falsefalsefalsetruefalseOthernanafalsefalseConsumer Price Index (reflects no deduction for fees, expenses or taxes)47Average Annual Total Returns Oppenheimer Limited Term New York Municipal Fund Limited Term New York Municipal FundUnKnownUnKnownUnKnownUnKnownfalsetrueColumnprimaryElement*Columndei_LegalEntityAxisAxisoppenheimer_S000010049MemberRowperiodPeriod*Rowrr_ProspectusShareClassAxisAxis*Rowdei_DocumentInformationDocumentAxisAxis*Rowrr_PerformanceMeasureAxisAxis*RowunitUnit*falsefalsefalseOtherus-types:textBlockItemTypestringContains a command for the SEC Viewer for the role corresponding to PerformanceTableData.No authoritative reference available.falsefalsePerformance [Table]121LT NY Muni (Limited Term New York Municipal Fund, Oppenheimer Limited Term New York Municipal Fund)UnKnownUnKnownUnKnownUnKnownfalsetrue